WO1998014694A1 - Engine working according to the method of pulsating combustion - Google Patents
Engine working according to the method of pulsating combustion Download PDFInfo
- Publication number
- WO1998014694A1 WO1998014694A1 PCT/DE1997/002129 DE9702129W WO9814694A1 WO 1998014694 A1 WO1998014694 A1 WO 1998014694A1 DE 9702129 W DE9702129 W DE 9702129W WO 9814694 A1 WO9814694 A1 WO 9814694A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- combustion chamber
- combustion
- fuel
- engine
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
- F01B11/007—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type in which the movement in only one direction is obtained by a single acting piston motor, e.g. with actuation in the other direction by spring means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B71/00—Free-piston engines; Engines without rotary main shaft
- F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/02—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet
- F02K7/06—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet with combustion chambers having valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
- F02B63/041—Linear electric generators
Definitions
- the invention relates to an engine operating on the principle of pulsating combustion and a method for operating the engine.
- Gas turbines operating according to the principle of pulsating combustion have become known (The Pulsej et Engine - a Review of its Development Potential; US Govern.report, onterey, California, USA, 1974), in which the energy of those escaping via an exhaust pipe Pressure waves are transmitted to a turbine wheel.
- the engine according to the invention which operates according to the principle of pulsating combustion, and the method according to the invention for operating the engine with the features of the independent claims have the advantage that an effective transmission of the pressure waves occurring during the pulsating combustion takes place to the mechanical movement element. This is preferably done within the housing in which the combustion also takes place. Due to the short transmission paths result in lower pressure losses than in the known from the prior art machines that work on this combustion principle. Furthermore, the fuel-air mixture is spark-ignited only during the starting process, so that the wear on ignition parts is minimal. Due to the internal exhaust gas recirculation that takes place during the pulsating combustion, very low NO ⁇ emissions arise due to the system.
- the outlet device for the exhaust gases advantageously opens into the cylinder space in which the piston moves.
- the piston itself takes over the opening and closing of the exhaust device in accordance with the cycle sequence of the combustion process.
- a spring element which is preferably designed as a helical compression spring.
- the translatory movements of the piston can advantageously be used to operate a generator.
- a generator is provided on the engine, with the movement of the piston a piston rod can be transferred to a linear rotor of the generator.
- the engine which in this case is designed as a generator, is advantageously used in an emergency power generator.
- Another advantageous application of the engine is as a drive for a compressor, in particular for use in a heat pump.
- the inlet device of the engine advantageously has a membrane which, depending on the pressure conditions in the combustion chamber, automatically opens or closes the inlet for fuel and combustion air.
- the elasticity of the membrane is selected so that due to the fuel pressure applied to part of the membrane, the membrane opens the opening to the combustion chamber.
- Figure 1 shows a partially sectioned illustration of an engine
- Figure 2 shows an enlarged intake device of the engine for fuel and combustion air. Description of the embodiment
- the engine shown in FIG. 1 has a pressure-resistant housing 10 in which a combustion chamber 12 is arranged. Via an inlet device 14
- Combustion chamber 12 supplied with fuel gas and combustion air. 2
- the inlet device 14 has a membrane 14a which closes a combustion air duct 14b and a fuel gas line 14c in which a nozzle 14d is arranged.
- an ignition device in the form of a spark plug 16 is also provided, with which the fuel gas / air mixture is ignited during the starting process.
- the combustion chamber 12 has a cylindrical part, hereinafter referred to as the cylinder 18, in which a piston 20 is arranged to move freely.
- a helical compression spring 24 is arranged in the cylinder space, the compression of which limits the translatory movement of the piston 20.
- a generator 26 is also connected, the piston 20 being connected via a piston rod 28 to a linear rotor (not shown) of the generator 26.
- the compression spring 24 it is also possible to fill the part of the cylinder space in which the compression spring 24 is arranged with a working gas, the compression of which limits the movement of the piston 20.
- the engine works on the well-known principle of pulsating combustion.
- a gas fitting (not shown) is opened, fuel gas passes via the fuel gas line 14c to the nozzle 14d arranged at the end of the fuel gas line 14c.
- the gas pressure present at the nozzle 14d is sufficient around the part which seals the nozzle 14d raise the membrane 14a so that fuel gas can be injected into the combustion chamber 12.
- Combustion air duct 14b remains closed by membrane 14a; the combustion air required for the first ignition process is already in the combustion chamber 12.
- the engine is started by igniting the fuel gas / air mixture with the aid of the spark plug 16, the membrane 14a closing the fuel gas supply again due to the sudden pressure increase in the combustion chamber 12. That expanding as a compression wave (overpressure wave)
- Dilution wave is reflected as a compression wave and again enters the combustion chamber 12, with combustion air and hot residual exhaust gases being entrained.
- a kind of "internal exhaust gas recirculation" takes place due to the entrained residual exhaust gases, which causes the pulsating combustion is limited to low NO x values.
- the membrane 14a closes the combustion air channel 14b and the nozzle 14d arranged in the fuel gas line 14c.
- the newly formed fuel gas-air mixture ignites on the hot residual exhaust gases, whereby the cycle of pulsating combustion begins again.
- the exhaust pipe or the engine as a whole is tuned or dimensioned such that the compression shaft reflected at the end of the exhaust pipe enters the combustion chamber 12 before the piston 20 closes the exhaust port 22 by the movement in the direction of arrow B.
- the piston 20 When the piston 20 has reached its end position, ie the compression spring 24 is relaxed again, the piston 20 is driven again in the direction of arrow A by the renewed ignition of the fuel gas / air mixture.
- the translatory movements of the piston 20 are transmitted via the piston rod 28 to the linear rotor of the generator 26, the mechanical work performed being converted into electrical energy.
- Such an engine designed as a linear generator, is preferably used as a drive for a portable emergency power unit.
- the generator 26 can act as a starter by energizing the starting process in cooperation with the piston. It is only through the movement of the piston 20 that the corresponding vacuum conditions are created in the combustion chamber 12, which enable the membrane 14a to be lifted off the seat of the fuel gas line 14c and thus the fuel gas to be injected.
- the component 26 in this case designed as a compression unit, has a compressor to which the piston 20 is connected via the piston rod 28.
- the working medium located in the compression unit 26 is compressed by the transmission of the lifting movement to the compressor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/269,486 US6213097B1 (en) | 1996-09-30 | 1997-09-19 | Engine working according to the method of pulsating combustion |
EP97909163A EP0929740A1 (en) | 1996-09-30 | 1997-09-19 | Engine working according to the method of pulsating combustion |
JP10516119A JP2001501701A (en) | 1996-09-30 | 1997-09-19 | Power machine working by pulsed combustion method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19640191A DE19640191A1 (en) | 1996-09-30 | 1996-09-30 | Engine operating according to the pulsed combustion process |
DE19640191.7 | 1996-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998014694A1 true WO1998014694A1 (en) | 1998-04-09 |
Family
ID=7807361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/002129 WO1998014694A1 (en) | 1996-09-30 | 1997-09-19 | Engine working according to the method of pulsating combustion |
Country Status (6)
Country | Link |
---|---|
US (1) | US6213097B1 (en) |
EP (1) | EP0929740A1 (en) |
JP (1) | JP2001501701A (en) |
KR (1) | KR20000048672A (en) |
DE (1) | DE19640191A1 (en) |
WO (1) | WO1998014694A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6876094B2 (en) * | 1999-11-12 | 2005-04-05 | Sarcos, Lc | Resonant electrical generation system |
US6874452B2 (en) * | 2002-01-15 | 2005-04-05 | Joseph S. Adams | Resonant combustion chamber and recycler for linear motors |
US7467607B2 (en) * | 2002-12-12 | 2008-12-23 | David Beatty Jones | Free piston vacuum producing apparatus |
CN1314895C (en) * | 2004-05-28 | 2007-05-09 | 陈建元 | Electrojet self-adaptable impulsive jetting engine device and controlling method thereof |
FR2932228B1 (en) * | 2008-06-10 | 2010-07-30 | Mbda France | MOTOR WITH PULSE DETONATIONS. |
JP5630123B2 (en) * | 2010-07-28 | 2014-11-26 | 株式会社豊田中央研究所 | Linear power generation free piston engine and starting method thereof |
RU2532326C1 (en) * | 2013-08-27 | 2014-11-10 | Александр Александрович Часовской | Propelling device |
US11280196B2 (en) * | 2014-03-20 | 2022-03-22 | Board Of Regents, The University Of Texas System | Systems and methods for generating power using a combustion source |
RU2595217C2 (en) * | 2014-12-02 | 2016-08-20 | Александр Абрамович Часовской | Aircraft |
RU2577742C2 (en) * | 2015-01-14 | 2016-03-20 | Александр Абрамович Часовской | Aircraft |
FI127178B (en) * | 2016-02-09 | 2017-12-29 | Finno Energy Oy | A combustion chamber arrangement and a system comprising said arrangement |
US10174718B2 (en) | 2016-09-10 | 2019-01-08 | James Peter Strasser | Combustion operated impulse drive unit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB881347A (en) * | 1958-03-04 | 1961-11-01 | Curtis Automotive Devices Inc | Improvements in or relating to pulse jet engines |
US4777801A (en) * | 1987-07-13 | 1988-10-18 | Porter David R | Energy conversion apparatus |
US4962641A (en) * | 1989-02-28 | 1990-10-16 | Elizabeth Ghougasian | Pulse jet engine |
US5361581A (en) * | 1993-04-21 | 1994-11-08 | Clark Barre A M | Pulsed piston-compressor jet engine |
DE4315046A1 (en) * | 1993-05-06 | 1994-11-10 | Hermann Dr Ing Schollmeyer | Free-piston engine and method for the conversion of energy stored in fuel into electrical energy in a free-piston engine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD30765A (en) * | ||||
DE1011664B (en) * | 1951-04-10 | 1957-07-04 | Werner Osenberg | Crankshaft and flywheelless internal combustion engine used to drive machining tools with electromagnetic influence on the piston travel and piston speed |
US2829276A (en) * | 1953-05-12 | 1958-04-01 | Jarret Jacques Henri | Arrangement for producing alternating magnetic fields |
FR1309350A (en) * | 1961-10-03 | 1962-11-16 | Electromechanical energy transformation device | |
US3208439A (en) * | 1964-02-14 | 1965-09-28 | Ingersoll Rand Co | Combination engine-compressor |
US4154200A (en) * | 1971-04-09 | 1979-05-15 | Jarret Jacques H | Non-polluting heat machine with internal combustion |
US3766399A (en) * | 1972-10-19 | 1973-10-16 | M Demetrescu | Combustion engine driven generator including spring structure for oscillating the inductor at the mechanical resonant frequency between power strokes |
FR2525686B1 (en) * | 1982-04-23 | 1986-09-05 | Peugeot | FREE PISTON INTERNAL COMBUSTION GENERATOR |
-
1996
- 1996-09-30 DE DE19640191A patent/DE19640191A1/en not_active Ceased
-
1997
- 1997-09-19 EP EP97909163A patent/EP0929740A1/en not_active Withdrawn
- 1997-09-19 JP JP10516119A patent/JP2001501701A/en active Pending
- 1997-09-19 KR KR1019990702620A patent/KR20000048672A/en not_active Application Discontinuation
- 1997-09-19 WO PCT/DE1997/002129 patent/WO1998014694A1/en not_active Application Discontinuation
- 1997-09-19 US US09/269,486 patent/US6213097B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB881347A (en) * | 1958-03-04 | 1961-11-01 | Curtis Automotive Devices Inc | Improvements in or relating to pulse jet engines |
US4777801A (en) * | 1987-07-13 | 1988-10-18 | Porter David R | Energy conversion apparatus |
US4962641A (en) * | 1989-02-28 | 1990-10-16 | Elizabeth Ghougasian | Pulse jet engine |
US5361581A (en) * | 1993-04-21 | 1994-11-08 | Clark Barre A M | Pulsed piston-compressor jet engine |
DE4315046A1 (en) * | 1993-05-06 | 1994-11-10 | Hermann Dr Ing Schollmeyer | Free-piston engine and method for the conversion of energy stored in fuel into electrical energy in a free-piston engine |
Non-Patent Citations (1)
Title |
---|
"THE PULSEJET ENGINE - A REVIEW OF ITS DEVELOPMENT POTENTIAL; US GOVERN. REPORT", 1974, MONTEREY, CALIFORNIA, USA |
Also Published As
Publication number | Publication date |
---|---|
JP2001501701A (en) | 2001-02-06 |
DE19640191A1 (en) | 1998-04-09 |
US6213097B1 (en) | 2001-04-10 |
KR20000048672A (en) | 2000-07-25 |
EP0929740A1 (en) | 1999-07-21 |
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